Designing Ce–O–Ti Interface Bridge in CeO<sub><i>x</i></sub>/N–Ti<sub>3</sub>C<sub>2</sub>T<sub><i>y</i></sub> Heterojunction for Electrochemical Hydrogen Evolution Reaction
Hau Quoc Pham, Quyen Huynh, Tai Thien Huynh
Abstract
We herein construct the Ce–O–Ti interface bridge in the CeO x /N–Ti 3 C 2 T y heterojunction through an ultrasonic-assisted hydrothermal route as an efficient Pt-free hydrogen evolution electrocatalyst. The synergistic contribution of the heterogeneous Ce–O–Ti bridge and oxygen vacancies boosts the water dissociation and thus drastically reduces energy barriers of the hydrogen evolution reaction (HER). The optimal CeO x /N–Ti 3 C 2 T y material requires only a small overpotential (51.12 mV RHE at 10 mA cm –2 ) and has a low Tafel slope (51.87 mV dec –1 ) and long-term stability with negligible changes in structural and morphological properties after at least 50 h of testing.
Topics & Concepts
OverpotentialTafel equationHeterojunctionMaterials scienceHydrogenDissociation (chemistry)ElectrochemistryOxygen evolutionHydrothermal circulationInterface (matter)Chemical engineeringElectrodeWater splittingNanotechnologyStructural stabilityElectrochemical energy conversionOxygenActivation energyBridge (graph theory)ChemistryHydrogen fuelOptoelectronicsRectificationEnergy transformationHydrogen productionInorganic chemistryElectrocatalysts for Energy ConversionMXene and MAX Phase MaterialsAdvanced Memory and Neural Computing